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annotate src/runguard.h @ 228:37d5f4329449

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Implement single running instance check to prevent problems with the SQLite database.
author Matti Hamalainen <ccr@tnsp.org>
date Tue, 20 Mar 2018 13:45:21 +0200
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37d5f4329449 Implement single running instance check to prevent problems with the SQLite database.
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1 //
37d5f4329449 Implement single running instance check to prevent problems with the SQLite database.
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2 // Taken and modified from https://stackoverflow.com/questions/5006547/qt-best-practice-for-a-single-instance-app-protection
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3 //
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4 #ifndef RUNGUARD_H
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5 #define RUNGUARD_H
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6
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7 #include <QObject>
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8 #include <QSharedMemory>
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9 #include <QSystemSemaphore>
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10
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11
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12 class RunGuard
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13 {
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14
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15 public:
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16 RunGuard(const QString &key);
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17 ~RunGuard();
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18
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19 bool isAnotherRunning();
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20 bool tryToRun();
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21 void release();
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22
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23 private:
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24 const QString key;
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25 const QString memLockKey;
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26 const QString sharedmemKey;
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27
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28 QSharedMemory sharedMem;
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29 QSystemSemaphore memLock;
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30
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31 Q_DISABLE_COPY(RunGuard)
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32 };
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33
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34
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35 #endif // RUNGUARD_H